Improvement in telegraph-conductors



J. T. SHUSTER. Telegraph Conductor.

No. 213,458. Patented Mar. 18, f879.

WITNESSES: [N VENTOR 0% @MW @M A 7 21) RNE VS.

a PETERS. PHOTO-LITNOGRAPHER, WASHINGTON, 0 C,

UNITED STATES PATENT OFFICE.

JOHN T. SHUSTER, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT lN TELEGRAPH-GONDUCTORS.

Specification forming part of Letters Patent No. 213,458, dated March18, 1879; application filed June 18, 1878.

To all whom it may concern Be it known that I, JOHN T. Sucsrnn, ofPhiladelphia, in the county of Philadelphiaand State of Pennsylvania,have invented certain new and useful Improvements in Telegraph-Gables;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, suca as will enable others skilled in theart to which it pertains to make and use it, reference being bad to theaccompanying drawings, which form part of this specification, in which-Figure 1 is a perspective of a telegraph-wire having the asbestus fiberwound or wrapped thereon. Fig. 2 is a perspective of the same with theasbestus braided thereon, and Fig. 3 is a perspective of a cluster ofwires having a braided asbestus coverin My invention has for its objectto provide an indestructible lire-proof telegraph wire or cable2 0., awire or cable which can be placed, without risk of deterioration, in theground, or in any other position in which moisture or other causes soonwork destruction of cables as ordinarily constructed, and which at thesame time shall be perfectly insulated and proof against tire fromexternal causes, and from heat generated internally by the passage ofelectricity through the conduct ing-wircs.

My invention consists of a wire or number of wires en'ibcdded in orcovered by asbestus or amianthus, forming a telegraph wire or cable.

teferring to the accompanying drawings, Fig. 1 indicates a single wire,A, covered with asbest m or amianthns, 33, applied in any suitableinanncr, as by wrapping or winding yarn termed of asbestus or amianthusliber.

Fig. 3 shows a cable composed of a series of wires, G G, embedded in acovering of amianthus or asbestus fiber, said covering being appliedbraiding onthe wires yarn composed of asbestus or amianthus fiber.

If desired, the single wire may have its covering applied by braidingthe asbestus or amianthus yarn upon it; or the cable may have saidi'lber wound upon it in the manner of the single wire; or any equivalentmethod of applying the covering to either the single or multiple wiresmay be employed.

Lo render the wire or cable water-proof, a

waterproofing composition or material of any suitable kind may beapplied in any appropriate manner.

A telegraph wire or cable thus constructed may be laid in the ground orin fresh or salt water without danger of deterioration, the asbestusbeing indestructible and not susceptible to waste or decay. Such wire orcable is also perfectly insulated, the asbestus or and anthus coveringbeing a noi'i-coiuluctor. It is further proof against fire from externalconflagrations, such as the burning of buildings, 850., above or infront of which the wire or cable may pass, and also against danger oftire produced by the electric current in cases where two wires comenearly or quite in contact, or where a wire is broken and the brokenends are at such a distance apart as to produce an electric spark. So,too, even where there is no break or imperl'ectioi'i in the wire, it hasbeen found that, where the latter is in use for a considerable time andhighly or strongly charged with electricity, it becomes so heated as toignite canvas or other like inflammable covering heretofore employed.This source of loss and danger is avoided by the employment of asbestusor amianthus as a covering, which will not take fire or be consumedunder heat of any ii'itensity.

To obtain perl'ect insulation where the wire is wrapped or wound withthe asbestus cov ering, it should be rewrapped or rewound a second time,and in an opposite direction from the first wrapping or winding, asshown at a in Fig. 1, where the outer reverse rewound covering isillustrated.

\Vhatl claim as my invention is- 1. As a new article of manufacture, atele graph wire or cable composed of a metallic wire or wires embeddedin or covered by as bestus or amiauthus, the same being in the form ofyarn or strand, and wound or braided upon the surface of the wire orcable.

The combination, with the wire or cable, of the asbestus insulator,composed of yarn braided upon said wire or cable, as described.

In testimony that I claim the foregoing I have hereunto set my hand.

JOHN T. SHUSTER. lVitnesses:

Geo. O. SHELMERDINE, CHARLES A. GALLAGHER.

